---------- Forwarded message ---------
发件人: NUAA无痕 <nuaawan...@gmail.com>
Date: 2022年5月25日周三 16:37
Subject: Re: [vpp-dev] hoststack-java netty segmentfault
To: Florin Coras <fcoras.li...@gmail.com>


hi, Florin
yes, im use LDP + java, i hava tested java socket, it works fine!
i think jvm also use libc.so, so i guess java socket will translate to c
socket, it is

now i m use LDP for netty,but it segmentfault
vpp version is 2101

this is info

Thread 17 "nioEventLoopGro" received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0x7f977571d0 (LWP 7042)]
0x0000007fb7d998a8 in svm_fifo_del_want_deq_ntf (f=0x0, ntf_type=2 '\002')
at /home/wanghe/ZFP-2101/src/svm/svm_fifo.h:770
770       f->want_deq_ntf &= ~ntf_type;
(gdb) bt
#0  0x0000007fb7d998a8 in svm_fifo_del_want_deq_ntf (f=0x0, ntf_type=2
'\002') at /home/wanghe/ZFP-2101/src/svm/svm_fifo.h:770
#1  0x0000007fb7da6ba0 in vppcom_epoll_ctl (vep_handle=1, op=3,
session_handle=10, event=0x7f97755c68) at
/home/wanghe/ZFP-2101/src/vcl/vppcom.c:2740
#2  0x0000007fb7dc02f0 in vls_epoll_ctl (ep_vlsh=0, op=3, vlsh=9,
event=0x7f97755c68) at /home/wanghe/ZFP-2101/src/vcl/vcl_locked.c:1293
#3  0x0000007fb7fbc390 in epoll_ctl (epfd=128, op=3, fd=137,
event=0x7f97755c68) at /home/wanghe/ZFP-2101/src/vcl/ldp.c:2294
#4  0x0000007fa8135b1c in Java_sun_nio_ch_EPollArrayWrapper_epollCtl ()
from /usr/lib/jvm/java-8-openjdk-arm64/jre/lib/aarch64/libnio.so
#5  0x0000007f9c08f49c in ?? ()
Backtrace stopped: previous frame identical to this frame (corrupt stack?)


this may a bug, if vpp can support java, it will very good
i need to enhance java web performance

best wish

Florin Coras <fcoras.li...@gmail.com> 于2022年5月22日周日 06:43写道:

> Hi,
>
> Are you trying to use LDP + java? I suspect that has never been tested and
> I’d be surprised if it worked.
>
> Regards,
> Florin
>
> > On May 20, 2022, at 2:18 AM, NUAA无痕 <nuaawan...@gmail.com> wrote:
> >
> > hi, vpp expert
> > im use vpp hoststack for java netty
> > but it segmentfault, reason is epoll use svm_fifo_t is null
> > can u give some suggestion,thank u
> >
> >
> > 
> >
>
>
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